Stock-based Compensation (Schedule Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Jul. 31, 2022 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Beginning of year, Options | shares	1,372
Granted, Options | shares	0
Exercised, Options | shares	(75)
Terminated, Options | shares	0
End of year, Options | shares	1,297
Exercisable at end of period, Options | shares	1,297
Beginning of period, Weighted-Average Exercise Price | $ / shares	$ 45.61
Granted, Weighted-Average Exercise Price | $ / shares	0
Exercised, Weighted-Average Exercise Price | $ / shares	38.15
Terminated, Weighted-Average Exercise Price | $ / shares	0
End of period, Weighted-Average Exercise Price | $ / shares	46.04
Exercisable at end of period, Weighted-Average Exercise Price | $ / shares	$ 46.04
Outstanding at end of period, Weighted-Average Remaining Contractual Life (In years)	4 years 9 months 18 days
Exercisable at end of period, Weighted-Average Remaining Contractual Life (In years)	4 years 9 months 18 days
Outstanding at end of period, Aggregate Intrinsic Value | $	$ 6
Exercisable at end of period, Aggregate Intrinsic Value | $	$ 6